Please do the first laundry in a washing machine with 86° F / 30° C with very little fine detergent. Make sure that it will fling with at least 1200 RPM to remove eventually remaining excess color pigments.
Do not chose a delicate wash cycle. Please use fine detergents only, no heavy duty detergent, no wool detergent, no bleaching, no chlorine and no fabric softener.
Remove the laundry from the machine as soon as the wash
cycle is finished and dry it on a hanger.